Emerson Alco 066148 Expansion Valve 30067439-890 This HVAC control board manages

This HVAC control board manages the critical defrost cycle by monitoring coil temperature and compressor run time to prevent excessive ice accumulation on the evaporator

Common Technician Questions: How do I know if the drain spud needs replacement

Safety Integration: Features a spring return check function to ensure a known fail-safe position during power interruptions

Can this core be used after a compressor burnout

or an oversized furnace

Emerson Alco 066148 Expansion Valve 30067439-890 This HVAC control board managesThe Emerson Alco 066148 is a high capacity 12 ton thermostatic expansion valve (TXV) engineered for large scale heat pump and commercial air conditioning systems. This genuine Alco TFES12ZAA replacement features a balanced port construction that effectively compensates for fluctuating head pressures and varying evaporator loads, ensuring stable superheat control across a wide range of ambient conditions. Designed specifically for R410A refrigerant